we want to welcome our viewers in the united states and around the world. i'm wolf blitzer, reporting live from charlotte, the site of the democratic national convention and you're in "the situation room." >>> and we're here in charlotte where the democrats are already gathering for their party's national convention. it starts on tuesday, but this is now becoming the campaign's command center, as democrats work to take back moment from the gop after the republicans grabbed the spotlight in tampa. president obama is on the road today, as democrats build up to their huge event in charlotte this week. let's begin our coverage this hour with our white house correspondent, brianna keilar. she's here already in charlotte together with me. we're watching what's going on. he is really trying, as desperately as he can, and he needs to, to rally his base, brianna, and make sure they turn up, turn out, and vote. because the enthusiasm level, this time, is clearly not what it was in 2008. >> yeah. he's even directing his supporters to a website where they can register